Find a 60-digit base-60 positive integer of the form :
X1 X2 X3.... X60, where

X1 denotes the total count of the digit 0 in the above number, and
X2 denotes the total count of the digit 1 in the above number, and
X3 denotes the total count of the digit 2 in the above number, and in general
Xj denotes the total count of the digit (j-1) in the above number.